[Snort-users] stream5 tcp session without 3-say handshake overload

Joel Esler (jesler) jesler at ...589...
Tue Aug 12 19:51:49 EDT 2014


I think what you want is: "http://manual.snort.org/node206.html”

--
Joel Esler
Open Source Manager
Threat Intelligence Team Lead
Talos

> On Aug 12, 2014, at 4:08 PM, Robert Millott <robm at ...16885...> wrote:
> 
> All
>   I am getting so many alerts in my logs it fill up /var/log/message and shut down snort.  The alert I see most is
> 
> stream5: TCP session without 3-way handshake.
> 
> I googled it, and everything I find on the "Check_session_hijacking" says "The default is set to off".  I am not sure why I am getting all these alert if the default is to off, but more importantly, how do I actually disable it?  
>   I am fairly sure I know why I am getting them, and that will take a longer time to fix, so I just need to disable this alert.  My snort.conf does not have anything about session_hijacking in it, so I"m not sure If I just need to add a line to disable it or what.
> 
> Details:
> Gentoo 3.14.4
> Snort 2.9.6.0 GRE (build 47)
> Barnyard: 2.1.13 (build 327)
> snort is outputting to /var/log/snort.u2 which barnyard is reading and writing to /var/log/messages
> snort.conf:  output unified2: filename snort1.u2, limit 128
> barnyard.conf :  output log_syslog_full: sensor_name xxxxxxx, local, log_priority log_alert, operation_mode default
> 
> Any help would be greatly appreciated
> 
> -- 
> Robert Millott
> President, Millott and Associates
> (443) 255-3588
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